NAME

       vte — Vortex86 RDC R6040 Fast Ethernet driver

SYNOPSIS

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             device miibus
             device vte

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             if_vte_load="YES"

DESCRIPTION

       The  vte device driver provides support for RDC R6040 Fast Ethernet controller which is commonly found on
       Vortex86 System On a Chip (SoC).

       The RDC R6040 has integrated 10/100 PHY for 10/100Mbps support in full or  half-duplex.   The  controller
       supports  interrupt  moderation  mechanism, a 64-bit multicast hash filter, VLAN over-size frame and four
       station addresses.  The vte device driver uses three station addresses out of four as  perfect  multicast
       filter.

       The vte driver supports the following media types:

       autoselect   Enable  autoselection  of  the  media  type and options.  The user can manually override the
                    autoselected mode by adding media options to rc.conf(5).

       10baseT/UTP  Set 10Mbps operation.

       100baseTX    Set 100Mbps (Fast Ethernet) operation.

       The vte driver supports the following media options:

       full-duplex  Force full duplex operation.

       half-duplex  Force half duplex operation.

       For more information on configuring this device, see ifconfig(8).

HARDWARE

       The vte device driver provides support for the following Ethernet controllers:

       •   DM&P Vortex86 RDC R6040 Fast Ethernet controller

LOADER TUNABLES

       Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5).

       hw.vte.tx_deep_copy
               The RDC R6040 controller has no auto-padding support for short frames and  the  controller's  DMA
               engine does not have capability to handle multiple buffers for a TX frame such that driver has to
               create  a  single  contiguous  TX  buffer.  This hardware limitation leads to poor TX performance
               since most of CPU cycles are wasted on both de-fragmenting mbuf chains and padding.  This tunable
               enables deep copy operation for TX frames such that driver will spend  less  CPU  cycles  in  de-
               fragmentation with the cost of extra TX buffer memory.  The default value is 1 to use deep copy.

SYSCTL VARIABLES

       The following variables are available as both sysctl(8) variables and loader(8) tunables:

       dev.vte.%d.rx_mod
               Maximum  number  of  packets to fire RX completion interrupt.  The accepted range is 0 to 15, the
               default is 15.

       dev.vte.%d.tx_mod
               Maximum number of packets to fire TX completion interrupt.  The accepted range is 0  to  15,  the
               default is 15.

       dev.vte.%d.stats
               Show hardware MAC statistics maintained in driver.

SEE ALSO

       altq(4), arp(4), miibus(4), netintro(4), ng_ether(4), vlan(4), ifconfig(8)

       DM&P Electronics Inc. Vortex86, http://www.dmp.com.tw.

HISTORY

       The vte driver was written by Pyun YongHyeon <yongari@FreeBSD.org>.  It first appeared in FreeBSD 8.3.

Debian                                          December 30, 2010                                         VTE(4)